| soundNERD |
| according to the datasheet, its pin 1 and 2 |
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| nbcd |
soundNERD:
cool site you got there! , i found some interesting schematics.
I want to ask you something. I got this SHARP stereo amp that uses STK 463 as a final chip amp. The thing is that one channel is working fine but when i plug the speaker to the other i hear a brum sound - something like when a transformer is making that 50Hz sound. If the input signal rises much i can here some vague noises (secialy when the bass rises)- but the sounds arent clean. I don't think the stk is burned because at full load he gets 3.2 Ampers and i have 2A fuses.
What do you supose it has , and what to do to check it out
Best regards!:smash: :smash: :smash: :smash: :smash: |
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| soundNERD |
Thanks for the comment!
Depending on if the amp is inverting or non-inverting, you can try connecting an input sound directly to the amp input. How I'd do it is take a portable cd player, put it on minimum, and use a cable that turns the stero plug into 3 wires. Touch the ground wire (usually bare) to the ground connection of the amp, and touch the output directly to either pin 1 or 2, depending on the amp configuration.
If that works, there is probably a short or bad solder connection between the input jack, the volume control and the amp. Check for that.
If it doesn't work, then I am thinking your chip is probably fried. |
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